The function and working principle of ballast: 1. Start […]
The function and working principle of ballast:
1. Start up and make the light source work steadily.
2. Maintain the power of the light source when the line voltage changes.
Cooperate with ballast to provide start-up high voltage. Most high-intensity gas discharge lamps, such as high-pressure sodium lamp, metal halide lamp and so on, require a specific power supply.
Start with a higher voltage. Generally, different types of HID lamps require pulse high voltage of 0.6-5.0 KV. An electronic hair divider can be produced.
Pulse high voltage is a device to start a light bulb. When the light bulb is ignited, the pulse high voltage disappears and the electronic trigger stops working.
The inductive load of the ballast is compensated by power factor. A ballast is a set of inductance coils. When a fluorescent lamp is connected to a power supply, the current passes through the town.
Current, starter and fluorescent lamp generate a voltage of about 1000V to light the fluorescent lamp when the starter is disconnected. When the fluorescent lamp is turned on, the ballast will limit the power.
The function of the pool is to withdraw the glow emitter from work at the same time. The starter acts as a trigger and the capacitor acts as a power factor compensation for the inductive load of the ballast. At the same time, the capacitor acts as a power factor compensation for the inductive load of the ballast.
Increase the lamp voltage.
Light sources requiring ballasts:
High pressure mercury bulb... Ballasts are required
High Voltage Nano Lamp... Ballasts and triggers are required
Metal halide bulb... Ballasts and triggers are required
High Intensity Gas Discharge Lamp Ballast:
HID lamp discharge tube has negative resistance characteristics and other properties, so it can not be directly lit by commercial electricity like incandescent lamp, but in the lighting circuit.
At the same time, ballast is used. The main functions of high voltage gas discharge lamp ballast are as follows:
1. Provide enough open-circuit voltage to start the lamp.
2. Control the starting current and working current of the lamp.